are there any other coins that have a halving coming or who just have halvings like ltc and btc?
LTC halving is pretty new to me. I know BTC halved to BCH, but not too sure if LTC also halved. Maybe Ethereum will halve too in future to Constantinople.
I think it would be better for you to go and read and learn about Halving because from this post of yours it seems you don't understand what halving is, so I would advice to learn about what halving is and what Hard Fork is, what you are referring to is Hard fork, which is very different from Halving